Window-lock.



E. P. DAVIS.

WINDOW LOCK.

APPLICATION FILED MAY 27, 1913.

1,1 14,867, Patented 0ct .27,1914.

Eluuemtoz THE NORRIS PETERS CO.. PHOTO-LITHQ, WASHINGTON, D (Iv EDWIN POWELL DAVIS, OF BRIDGEPORT, CONNECTICUT.

WINDOW-LOCK;

Specification of Letters Patent.

Patented Oct. 2'7, 1914.

Application filed May 27, 1913. Serial No. 770,163.

To all whom it may concern:

Be it known that I, EDWIN P. DAVIS, a citizen of the United States, residing at Bridgeport, in the county of Fairfield and State of Connecticut, have invented certain new and useful Improvements in Window- Locks; and I dohereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to window-locks. Its object is to provide a lock which will permit the parts of a window to be secured when either section is adjusted for ventilating purposes. To this end it comprises the combination of details set forth in the appended claims. a

In. the drawings Figure 1 is a partial view in elevation of the sashes of a window and the frame showing the relative location of the parts of the lock. Fig. 2 is a longitudinal section of the parts of the lock in enga ement. Fig. 3 is a transverse section showmg the base-plate and the rear plate of the casing about to be connected to the base-plate. Fig.4 is a detail perspective showing the lock-lever. Fig. 5 is a detail perspective showing the catch which is secured to the rail of the lower sash in the illustrated application.

Reference numeral 1 indicates the lower sash and 2 the upper sash. As indicated in Fig. 1, one part of the loclgpreferably the catch, is secured to the upper rail of the 1 lower sash while the body of the lock is secured at some determined position to the side of one of the stiles of the upper window sash, so that when the lower sash is raised the catch will engage its lock and when the upper sash is lowered the parts of the lock will likewise engage. a

In the form which I have illustrated 3 represents a casing, preferably of metal, with a front wall 4; having a forwardly extending trough-like portion. This front wall may be either integral with the main shoulder 6 is placed a spring? The b0ttom of the post 5 passes through a baseplate 8 which is secured to the stile of the window sash, a struck-up opening 9 being provided for this purpose.

The baseplate 8 has a body substantially circular in form with two opposite wings or sectors 10 and 11 each of which is similarly grooved, as indicated at 12, to engage a rib 13 on the parts now to be described. I, preferably, construct the casing as illustrated, that is, with. a hood substantially horseshoe shaped in cross section and carrying at the rear a part having its face 16 cut away at 17 to conform to the base-plate 8, and a flange 18 bent around and riveted or ogherwise secured to the body of the casmg The edges of the part 16 engage beneath the wings 10 and 11 which are slightly elevated from the rail of the window sash. The object is to place the bottom of the post 5 in the opening 9 with the body of the lock turned at substantially right angles to the rail and then to turn the body of the look so that the opposite sides of the part 16 will engage beneath the wings 10 and 11, the ribs 12 finally snappinginto place in the grooves 13 on the face 16 so that the lock body or casing shall be centrally positioned upon the stile.

19 represents a lock-lever comprising a plate which, in the illustrated form, is substantially rectangular and which is perforated at 20 to take over the post 5. The lock-lever 19 lies between the shoulder 6 place and yielding against pressure while the shoulder 6 prevents the lock-lever from. being pressed back too far by the spring 7..

The rear end of the lock-lever 19 is provided with a projection or a series of projections 21 to pass through a perforation or perforations 22 in the top wall of the casing so that the lock-lever is fulcrumed in the top wall of the casing. The extending part 23 of the lock-lever forms a thumb or finger grip which may be readily engaged by the operator so that a pull and lift upon the locklever will release it and permit the catch and the body of the lock to be separated.

24: represents a catch-plate which, in this illustration, is formed with three teeth. The upper tooth 25 projects slightly above the horizontal plane of the two lower side teeth 26 so that as it comes into engagement with side of the thumb piece 23 and finally snap into engagement in the perforation 27 in the plate part of the lock-lever 19. The two side teeth of the plate 26 rest against the face of the plate part of the lock-lever preventing a downward movement.

In the application of this window-lock the body of the lock containing the lever-lock may be placed at any desired point on the upper window sash. Generally this point should be chosen so that neither sash can be brought to a position which would enable a person to enter the room through the opening. For example, if in a position as illus trated in Fig. 1 when the lower sash is lifted the catch will engage the lock on the upper window-sash and hold the lower window elevated to the desired position. Or the upper Window sash may be brought down until the lock engages the catch on the lower window-sash. Even if some one from outside were to lift the lock-lever 19 and dis engage the catch and the lock, the lower window, for example, could not be raised nor the upper window lowered because to do so would simply bring the parts of the look again into engagement. It is, therefore, apparent that this look permits both parts of a window to be locked together when open at the top or bottom or when open at both top and bottom. Ordinarily also it will prevent the windows from being pushed apart. On the other hand, by one within the room, the upper lock may be readily removed by simply turning it upon its axis and lifting it ofi to permit the window to be adjusted to any desired position. To enable this ready adjustment it is obvious that the base-plate 8 may be duplicated or multiplied at various points so that the lock may be adapted to any desired separation of the windows.

The arrangement of the casing, preferably made of metal, is such that it protects the parts and prevents access or injury thereto. The flange 18, as clearly indicated in Fig. 2, projects sufiiciently over the opening made by the meeting rails of the sashes to prevent the releasing of the look through the opening. As before indicated, the construction of the casing is of sufficient strength to withstand severe abuse and all the mechanism and screws are protected from felonious removal.

The construction of the lock is such that all the parts are reduced to the simplest possible form so that I secure economy in the manufacture and simplicity in the operation. With the locking part attached, for example, to the stile of the upper window-sash it will be seen that the upper sash cannot be lowered beyond a predetermined position because the locking part will strike the rail of the lower sash, and, conversely, the lower sash cannot be raised beyond a predetermined point. The base-plate being substantially flat and thin does not interfere with raising or lowering the sash so that a series may intervene between the upper one and the rail of the opposite sash. In ordinary practice it would be found expedient to place the locking part in such po sition as to be practically inaccessible through the determined opening of the window. It will also be observed that this device may be applied to other structures similar in operation to a window.

It is to be understood that the specific construction of the parts is subject to various modifications of form and detail which would be within the scope of my invention, the example I have illustrated being an emcient and cheap construction to carry out the purpose I have in view.

I claim- 1. In a window-lock, the combination of a series of base-plates applied to the stile of a sash at intervals and a locking part adapted to engage any of the base-plates and a catch secured to the other sash.

2. In a window-lock, the combination of a base-plate adapted to be secured to a window sash and having wings which as thus secured are slightly elevated above the sash, and a locking part comprising a casing with projecting parts adapted to enter beneath the wings of the base-plate to secure the lock in working position.

3. In a window-lock, a base-plate having a central opening and wings with a portion slightly elevated, in combination with a lock-casing having a central post to enter the opening in the base-plate and projections to take beneath the wings so that the lock-casing may be secured in position on the base-plate and may be removed by turning and then lifting.

1. In a window-lock, the combination of a base-plate with portions of its rim cut away, the remaining portions forming wings which are slightly elevated above thepart of the window to which the base-plate is secured in combinationwith a casing having a wall cut in substantial correspondence with the base-plate so that a part of the casing may be fitted over the base-plate and then turned to catch beneath the wings of the base-plate.

5. In a window-lock, alocking part having a two part casing adapted to be attached a spring-pressed lock-lever carried by the post and projecting outward within the trough-like portion of the casing and engeged by the catch in operation.

7. In a window-lock, the combination of a locking part comprising a base-plate secured to the stile of a Window sash, a casing removably secured to the base-plate and extending out from the window sash, a catch on the other sash of the Window, the locking part serving to receive the catch and also present anobstacle to the movement of either part of the window beyond a predetermined point.

8. In a, window-lock, the combination of Copies of this patent may be obtained for five cents:each, by addressing the Commissioner of Patents.

upper part of the cesmg and having a pro 20 j ecting thumb or finger piece accessible from the open or lower part of the casing.

In testimony whereof I have hereunto signed my name in the presence of two subscribing witnesses.

EDWIN POWELL DAVIS.

Witnesses:

JOHN W; Smcn, SARAH E. ENBIGN.

Washington, D. G. 

